139521603969 has 12 divisors (see below), whose sum is σ = 219852224592. Its totient is φ = 84558547800.

The previous prime is 139521603959. The next prime is 139521603979. The reversal of 139521603969 is 969306125931.

139521603969 is a `hidden beast` number, since 1 + 3 + 9 + 5 + 21 + 603 + 9 + 6 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (139521603959) and next prime (139521603979).

It is not a de Polignac number, because 139521603969 - 2⁴ = 139521603953 is a prime.

It is a super-2 number, since 2×139521603969² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (139521603959) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 704654467 + ... + 704654664.

It is an arithmetic number, because the mean of its divisors is an integer number (18321018716).

Almost surely, 2^139521603969 is an apocalyptic number.

It is an amenable number.

139521603969 is a deficient number, since it is larger than the sum of its proper divisors (80330620623).

139521603969 is a wasteful number, since it uses less digits than its factorization.

139521603969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409309148 (or 1409309145 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 54.

The spelling of 139521603969 in words is "one hundred thirty-nine billion, five hundred twenty-one million, six hundred three thousand, nine hundred sixty-nine".